pH Test Paper Book Type No.20 1 Box (20 sheets x 10 pieces) 07010110 1 Box (20 sheets x 10 pieces)

To maintain high reliability, all products are labeled with an expiration date. Easily measure the pH (hydrogen ion concentration) of aqueous solutions. Effective pH measurement range: 5.0 to 8.0 Quantity: 1 set (20 sheets x 10 packs)